Portland Thorns coach Paul Riley's high-pressure, attacking style of play was on full display Friday night as the Thorns routed the University of Arizona 10-0 in Portland's first public preseason match of the year.

"I thought we played some great football tonight," Riley said. "I think for actually working out the kinks, it was a perfect game for us tonight."

The Thorns scored twice in the first six minutes and never let up in front of a crowd of 1,774 in Tucson, Ariz.

Thorns forward Jessica McDonald quickly flicked a header into the box for Christine Sinclair, who put the ball in the back of the net to get the scoring started. A few minutes later, midfielder Angie Kerr scored with a left-footed shot from the top of the box.

"We’ve been training very hard throughout this preseason and it was nice to get to play against another team," Sinclair said. "I thought it went well."

"I was just happy with the overall movement of the ball," Riley said. "The fitness level is pretty high in the group."

The result may not seem that surprising with a professional team taking on a college squad, but the match still gave Riley a chance to see how well the Thorns could implement the high-pressure style of play they've been working on in preseason.

As part of Portland's high-pressure style, the Thorns' played a high back line on defense and will continue to keep a high back line during the regular season.

"They are going to get some pressure on them and it's going to force them to be better players this year," Riley said. "I want them to take risks. I want them to be brave."

Riley used 17 different players in the match as he continued to evaluate his lineup ahead of the Thorns' first game of the season on April 12.

The Thorns coach is still trying to decide who to start alongside Sinclair at forward as Thorns star forward Alex Morgan continues to recover from injury. McDonald, Shim and Jackie Acevedo are all possible candidates to start next to Sinclair.

"Sinc is one of the best finishers I’ve ever seen at any level, men or women," Riley said. "She needs a partner in crime and we need to find that partner this weekend."

The match also gave Riley another opportunity to evaluate his trialists. Draft pick Elisabeth Sullivan, as well as trialists Courtney Niemiec, Hanna Terry, Kat Tarr and Michelle Cruz are all in Arizona competing for a roster spot.

The Thorns will play Arizona State University on Sunday at 2 p.m. before returning to Portland.